import numpy as np
import matplotlib.pyplot as plt

def f(t):
    return np.exp(-t) * np.cos(2*np.pi*t)

# t1 = np.arange(0.0, 5.0, 0.1)
# t2 = np.arange(0.0, 5.0, 0.02)

# plt.figure(1)
# plt.subplot(211)
# plt.plot(t1, f(t1), 'bo', t2, f(t2), 'k')

# plt.subplot(212)
# plt.plot(t2, np.cos(2*np.pi*t2), 'r--')


plt.figure(1) # the first figure
plt.subplot(221) # the first subplot in the first figure
plt.plot([1,2,3])
plt.subplot(222)
plt.plot([7,8,9])

plt.subplot(223) # the second subplot in the first figure
plt.plot([4,5,6])
'''
plt.figure(2) # a second figure
plt.plot([4,5,6]) # creates a subplot(111) by default
plt.figure(1) # figure 1 current; subplot(212) still current
plt.subplot(211) # make subplot(211) in figure1 current
plt.title('Easy as 1,2,3') # subplot 211 title
'''
plt.show()